4.9.2 PV array string input connections
To ensure maximum protection against hazardous contact voltages
while assembling photovoltaic installations, both the positive and
the negative leads must be strictly isolated electrically from the
protective ground potential (PE).
CAUTION!
PRUDENCE!
Verify DC conductor voltage polarity with voltage meter because
damage to the inverter could result if incorrect DC input polarity is
connected.
Risk of damage. Be sure that the polarity is correct when you make
the connection. Connecting it wrongly will cause damage to the
inverter.
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